Gluing machine



J. M. MINKOW GLUING MACHINE June 13, 1950 2 Sheets-Sheet 1 Filed Jan.13, 1947 awe/whom a MM'niww June 13, 1950 J. M. MlNKOW 2,511,781

GLUING MACHINE Filed Jan. 15, 1947 2 Sheets-Sheet 2 /4- JMM'ZZZOWPatented June 13, 1950 GLUING MACHINE Julius M. Minkow New York. N. Y.,assignor "to vMineo Products Com, New York, N. 'Y., acorporation of NewYork Application. .Ianuary13, 1947, "Serial No. '3 21,783

2 Claima (C1. 91-51) '1' This invention relates .to guards forgluingimaa chines of the type disclosed in my Patent .Number 2,461,388,issued February 8, .1949, entitled Gluing machine. I

In gluing machines for gluing sheets 'o-f material such as paper,card-board, corrugatedboard or the like, there are provided a largegluing:

roller and a iwiping roller for removing excess glue from the largeroller and for gauging, the glue coating which remains on the largegluing roller. During the rotation of these rollers a quantity of gluewill always over the ends of the rollers and wil1inashor-t time clog upthe roller shafts and bearings. In-order toovercome this condition awiper is supported at eachend of the two rollers which contacts" bothrollers at their ends andreturns the excess glue to the reservoir.

Another object. of this invention .is to provide a side scraper for aroller or the rollersloi (a gluing machine, which will scrape the excessglue from the side or sides of the roller or rollers and will lead thisexcess glue directly back into the glue tank so that the glue has nochance of being transferred to the hubsof the rollers and thence intothe bearings of the rollers.

Another object of thisinventionis to provide an improved means formaintaining the glue at the 1091136013 temperature, This is accomplishedby mounting a thermostatic switch directly ,beneath the vertical plane90f the contacting point between the two gluing rollers. glue is a verypoor conductor of heat, the exact position of the heat regulator is Veryv.imrgxirtant.

in order that the temperature of the glue may be properly maintained.Heaters for the glue are normally beneath the bottom of the reservoir,but the thermostatic regulator for the heater must be 'properly placedwithin the reservoir so that the glue coming into contact with "the dipping roller will at all times be maintained at the same predeterminedtemperature and will not be either too hot or too cold.

I have discovered that if the glue at 'thejpart of the supply thereofwhere it picked up by the dipping roller is maintained .atthe tempera;-ture which has bee predetermined as the tdesired temperature for the"entire supply efuglue in' the machine, the entire problem ofmaintaining the working .temperature'of the glue isselveil as thetemperature of the glue :at this pick up point is the criticaltemperature of the supply of glue because that part of the glue supplyis what is being steadily used by the machine. Some of the glue pickedup at this point is used,

Inasmuch as according-to the doctor roll setting. andthe-rex cess isreturned to the supply tank at about the point of pick-up, glueafrom therest of the tank being :alwaysdrawn tolthispick up point andconsequentlythis 18 .1116 point of greatestlcircu-latipn of the glue. Therefore.maintaining theright temperature at this spot always keeps the gluebeing immediately used at the correct tempera: ture.

With the above and other objects View, my inventicn consists. inthearrangement, combina tion and details of construction disclosedinythe drawings and specification, :and then moreparticularlypointedoutin theappended. claima.

In the drawings:

. Figure 1 isa: fragmentary 1130? plan. of. a gluing machine constructedaccording .to an embodi merit of this invention,

Figure 2 is a fragmentary sideelevation, zpartly broken away 1 Figure 3is a transverse section taken on :the

line 3-3 of Figure 1, v Figure 4 is a section taken on theline L- lofFigure 2, I

Figure-i5 is a-fra gmentaiar section taken-:ronthe line 5-5 of Figure 3V V Figure 6 ;is aperspective -.view of. the scraper.

removed rrom the gluing machine. Referring tothe drawings, theznumeralilflcdes j ignates generally ag gl-uing-m 'chine of the kind morespecifically described in my Patent Number 2,461,338 issued February 8,l9.49 ,.entitled Glu ing machine, having a glue .well 21 1 formedtherein. The gluing .machine 10 is formed with ,a. pair-ofopposite-sidewalls t2 hetween which are rotatahlysupported agluingrellerI4 and a doctor'roller t5 mgaeiement with the gluing roller. Theoppositerreduced endsrhl and 22 0f each of the rollers Hand 15,.respectively, teemprise bearing members which are journaiedini bearings-lfiiixedg'in ppposites-ide walls of thegluing well H ;=near..theupper-edge thereof. V The gluing roller H is of relatively large niameter and so dispo'sed that the bottom edge hf, roller 414abeqpartiallysubmerged in'the glu material in :the wells-H.'The-de:ctor.ro1ler 15 engages the iside ofzthe lghiing roller 14alongione edge "thereof, for removing the excess material from theigluing roller before the ghie of the well II and substantially appliesheat to the entire lower surface thereof.

The most critical point where the temperature of the glue is of theutmost importance is that point dirrectly below the gluing roller wherethe roller emerges from the mass in its rotation. In order to maintainthis portion of the material at the desired working temperature, a.thermostat I9 is placed in the well II, directly below the point atwhich the doctor roller I engages with the gluing roller I4. Thethermostat I9 is supported from one of the side walls I2 of the gluingmachine. For the most desirable characteristies, the thermostat I9 isdisposed below the point of contact of the two rollers in the verticalplane passing through that point and extended into the well. Thethermostat I9 may be of any conventional style and as shown in thedrawings is tubular in configuration, having electric con-' tact pointsfixed thereto on the outer side, which'extend outwardly from the side ofthe machine.

In the use of gluing machines of this type, the glue being picked up bythe gluing roller l4 and partially placed on the doctor roller I5frequently flows over the ends of each of the rollers onto reduceddiameter bearing members 2I of the gluing roller, and reduced diameterbearing members 22 of the doctor roller. The gluing material thusdeposited on the bearings greatly interferes with the operation of themachine as a whole.

In order to keep the lue from the bearings, there is provided a scraper24 which may be attached on the inner side of one wall of the machineand engages the ends of the rollers for scraping the material and forguiding the material back into the tank II. The scraper 24 is formed ofa flat upper portion or supporting member 25 from which depend thescraping blades. The blades'are fixed to or formed on the centralsupporting portion 25 in diverging relation to each other. One blade, as26, extends downwardly and outwardly from one side of the supportingportion 25 with the inner edge thereof in alignment with the inner edgeof the supporting member 25. The other blade, as 26a, is disposed indownwardly and outwardly extending relation to the other side edge ofthe supporting member 25 and is formedon its end withan outwardly offsetscrapin edge 21. The edge 21 is offset from the inner edges of thesupporting member 25 and the other blade 26 for engagement with theouter end of the doctor roll [5. The doctor roll I5 is longer than thegluing roller I I in order to provide for the doctor roll I5 completelyengaging the entire length of the gluing roller I4 so that thedisposition of the material on the gluing roller will be uniformthroughout its length.

For fixing the scraper 24 in the machine I0,

there is provided an inverted L-shaped bracket 28 having right angularlyrelated arms 29. One arm 29 is adapted to be fixed to the side wall I2by bolts 30 or other suitable fastening devices, and the scraper 24 isadapted to be secured to the other or horizontal arm 29 by bolts 3Iwhich engage through the central portion 25 of the scraper and arethreadably engaged in the openings 32 in the horizontal arm 29. Thescraper 25 is disposed so that the scraping edges are spaced from thebearings of the rollers to permit the 4 free rotation thereof. It is notnecessary that the scraper 25 should engage the hub of the rollerbecause the gluing materia1 as it is scraped from the edges of therollers and before it can be deposited on the hubs and thus be led intothe bearings, is deflected downwardly and returned to the tank. v

I do not mean to confine myself ,to the exact details of constructionherein disclosed, but claim all variations falling within the purview ofthe appended claims.

What I claim is:

1. In a gluing machine includin an upwardly opening gluing chamberformed with side walls thereon, a gluing roller rotatably mountedbetween said side walls, and a doctor roller rotatablycarried bysaid'side walls in parallel and surface contacting relation to saidgluing roller; roller scraping means comprising an inwardly extendingsupporting plate carried byeach of said side walls, and disposed betweenthe axis of rotation of said gluing and doctor rollers, a second platesupported by said first mentioned plate, a downwardly inclined scrapingblade depending from each of two opposite sides of said second plate,said blades being disposed with theinner edges thereof in scrapingcontact with the end faces of said gluing and doctor rollers whereby theglue on said end faces will be removed from said gluing and doctorrollers and returned to said gluing chamber by reason of the downwardinclination of said blades.

2. In a gluing machine including an upwardly opening gluing chamberformed with side walls reduced diameter bearings journalled in said sidewalls; roller scraping means comprising an inwardly extending supportingplate carried by each of said side walls and disposed between theadjacent gluing roller and doctor roller bearing members, andsubstantially in horizontal alignment with the axis of rotation thereof,a second plate carried by said supporting plate, a downwardly inclinedscraping blade depending from each of two opposite side edges of saidsecond plate, theinner edges of said blades being'disposed in end facecontacting relation to said rollers whereby the glue on said end faceswill be removed from said gluing and doctor rollers and returned to saidgluing chamber by reason of the downward inclination of said blades.

- JULIUS M. MINKOW.

REFERENCES oI'rEn "The following references are 'of'record in the fileof this patent: V

UNITED STATES PATENTS Date

